package com.itheima.controller;

import com.itheima.pojo.Result;
import com.itheima.pojo.User;
import com.itheima.service.UserService;
import com.itheima.utils.JwtUtil;
import com.itheima.utils.Md5Util;
import com.itheima.utils.ThreadLocalUtil;
import jakarta.validation.constraints.Pattern;
import lombok.RequiredArgsConstructor;
import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.URL;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@RestController
@RequestMapping("/user")
@Validated
@RequiredArgsConstructor
public class UserController {

    private final UserService userService;

    private final StringRedisTemplate stringRedisTemplate;

    @PostMapping("/register")
    public Result<String> register(@Pattern(regexp = "^.{5,16}$") String username, @Pattern(regexp = "^.{5,16}$") String password) {
        User u = userService.findByUsername(username);
        if (u == null) {
            userService.register(username, password);
            return Result.success();
        }
        return Result.error("用户名已被占用");
    }

    @PostMapping("/login")
    public Result<String> login(@Length(min = 1, max = 16) String username, @Length(min = 1, max = 16) String password) {
        User loginUser = userService.findByUsername(username);
        if (loginUser == null) {
            return Result.error("用户名错误");
        }
        if (Md5Util.getMD5String(password).equals(loginUser.getPassword())) {
            Map<String, Object> claims = new HashMap<>();
            claims.put("id", loginUser.getId());
            claims.put("username", loginUser.getUsername());
            String token = JwtUtil.getToken(claims);
            stringRedisTemplate.opsForValue().set(token, token, 12, TimeUnit.HOURS);
            return Result.success(token);
        }
        return Result.error("密码错误");
    }

    @GetMapping("/userInfo")
    public Result<User> userInfo() {
        Map<String, Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User user = userService.findByUsername(username);
        return Result.success(user);
    }

    @PutMapping("/update")
    public Result<String> update(@RequestBody @Validated User user) {
        userService.update(user);
        return Result.success();
    }

    @PatchMapping("/updateAvatar")
    public Result<String> updateAvatar(@RequestParam @URL String avatarUrl) {
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }

    @PatchMapping("/updatePwd")
    public Result<String> updatePwd(@RequestBody Map<String, String> params, @RequestHeader("Authorization") String token) {
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");
        if (StringUtils.hasLength(oldPwd) && StringUtils.hasLength(newPwd) && StringUtils.hasLength(rePwd)) {
            Map<String, Object> map = ThreadLocalUtil.get();
            String username = (String) map.get("username");
            User loginUser = userService.findByUsername(username);
            if (loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))) {
                if (rePwd.equals(newPwd)) {
                    userService.updatePwd(newPwd);
                    stringRedisTemplate.opsForValue().getOperations().delete(token);
                }
                return Result.error("两次填写密码不一样");
            }
            return Result.error("原密码填写不正确");
        }
        return Result.error("缺少必要参数");
    }

}
